KIP-1132 — KRaft servers support invalid static SocketServer configurations

Discarded Kafka 4.1 KRaftBroker

KIP-1132 fixes KRaft brokers to tolerate static `SocketServer` configurations that would be invalid in isolation (e.g., a listener referencing a certificate not yet present on disk) when a prior dynamic reconfiguration already makes the effective configuration valid. Brokers crashed on startup with an uncaught exception whenever the static config was syntactically invalid, even if the dynamic config override rendered it harmless.

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